Combined with extra exercise, the diffuser has helped calm down my two adolescent male rescue guinea pigs who were chewing at their c&c grids and just generally rather crazy. They had started to fight with each other and although the pet remedy hasn’t helped with those two, it has helped me bond one of them with one of my older boars and they make a much better pairing personality wise. The diffuser does have quite a strong smell which I can understand why people don’t like it but I got used to it after a week or two.